/*
 * The MIT License
 * Copyright © 2014-2019 Ilkka Seppälä
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package com.iluwatar.priority.queue;

/**
 * Manage priority queue.
 */
public class QueueManager {
  /*
     Priority message
   */
  private final PriorityMessageQueue<Message> messagePriorityMessageQueue;

  public QueueManager(int initialCapacity) {
    messagePriorityMessageQueue = new PriorityMessageQueue<>(new Message[initialCapacity]);
  }

  /**
   * Publish message to queue.
   */
  public void publishMessage(Message message) {
    messagePriorityMessageQueue.add(message);
  }


  /**
   * Receive message from queue.
   */
  public Message receiveMessage() {
    if (messagePriorityMessageQueue.isEmpty()) {
      return null;
    }
    return messagePriorityMessageQueue.remove();
  }


}
